vitest

Run Jest-compatible tests within Vite-powered projects.

Updated Aug 27, 2026
One-click install
npx skills add https://github.com/ajiu9/skills --skill vitest-ajiu9
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/ajiu9/skills/tree/main/skills/vitest
Command: npx skills add https://github.com/ajiu9/skills --skill vitest-ajiu9

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides a fast, Jest-compatible testing framework that integrates seamlessly with Vite-powered projects, eliminating slow test cycles and simplifying configuration.

Core Features & Use Cases

  • Jest-compatible API for familiar syntax and behavior
  • Vite-native test runner with fast module graph and HMR-like updates
  • Built-in coverage, snapshots, and mocking utilities
  • Suitable for unit, integration, and end-to-end testing within a Vite project

Quick Start

Create a test file next to your source and run the Vitest command in your package scripts to execute tests quickly.

Frequently Asked Questions about vitest

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I run unit tests in a Vite project?

Vitest provides fast unit testing in a Vite project by leveraging the Vite-native module graph, requiring only a vitest.config.ts file with test settings and standard test file conventions to execute tests quickly.

Can I use Jest-compatible syntax for JavaScript and TypeScript testing?

Vitest provides a Jest-compatible API for JavaScript and TypeScript testing, allowing you to use familiar syntax and behavior while benefiting from fast, HMR-like updates within your Vite workflow.

Does Vite-native testing support built-in mocking and code coverage?

Vite-native testing with Vitest includes built-in coverage, snapshots, and mocking utilities, enabling you to validate code correctness across unit, integration, and tooling tasks without external dependencies.

What's the best way to speed up slow test cycles in a Vite workflow?

Vitest speeds up slow test cycles in a Vite workflow by applying fast module graph processing and HMR-like updates, eliminating slow configuration and providing immediate test reporting.

Do I need a vitest.config.ts file to execute isolated tests?

Yes, you need a vitest.config.ts file containing test settings to enable fast, isolated test execution and reporting, ensuring the test runner integrates correctly with your Vite project setup.